As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS BOTH FMCS ON 2 OCCASIONS DELETED ALL WAYPOINTS FROM THE ROUTE AND LEGS PAGE. RESULTING IN A COMPLETE LOSS OF THE FLIGHT PLAN. NO FAILURE MESSAGE. MAINTENANCE UPLOADED FMC SOFTWARE IAW AMM 34-61-00, OPS CHECK GOOD.